Answer:
What do people spend a lot of money on every year, but never want to use?
What has 3 feet but no toes?
What invention lets you look right through a wall?
I wear a red robe with staff in hand and a stone in my throat.
Everyone asks for me but yet everyone hates to face me. For someone I am agony, for others I am relief! What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.